Battery pack device



FIG. 1 is a top plan view of a battery pack device.

FIG. 2 is a bottom plan view of the battery pack device.

FIG. 3 is a left side elevation view of the battery pack device.

FIG. 4 is a right side elevation view of the battery pack device.

FIG. 5 is a front elevation view of the battery pack device; and,

FIG. 6 is a rear elevation view of the battery pack device.

The broken lines shown in the figures are for the purpose of illustrating certain portions of the battery pack device and form no part of the claimed design. 

CLAIM The ornamental design for a battery pack device, as shown and described. 